Smallville showrunner Kelly Souders has revealed that the production team have a wishlist of elements to include in the show's final season.

She told SFX that she and co-producer Brian Peterson have looked at the past nine seasons for inspiration.

"As we've gone through every season, there are things that we literally add to our wishlist for the final season," she said. "So we're just literally gunning. Everybody's excited for the season [and] came back energised."

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Souders admitted that having an end date for the series was "a very rare gift".

"Usually you know three episodes before your final finale [that your show is ending] so we're very thrilled to have a whole year to plan," she said.

However, she refused to confirm if the final shot of the series will see Clark (Tom Welling) wearing the famous Superman costume.

"Everyone expects it to be Clark in the costume," she teased. "I will say that we know the final shot!"